1.1 Earth's Crust in Motion


Vocabulary


Geologists - scientists who study the forces that make and shape the earth
Geology - the study of planet Earth
Constructive forces - forces that build up landmasses like mountains
Destructive forces - forces that slowly wear away mountains and surface such as what an ocean does
Continents - seven large landmasses on earth
Seismic waves - waves that move through the Earth's interior
Pressure - force pushing on a surface or area
Crust - layer of rock that makes up the Earth's outer skin
Basalt - dark, dense rock that forms the oceanic crust
Granite - rock with larger crystals that is less dense than basalt and makes up the continental crust
Mantle - layer of hot rock below the crust
Lithosphere - means "stone" and is the mantle and crust together
Asthenosphere - means "weak" soft rock material that can flow slowly
Outer core - layer of molten metal that surrounds the inner core
Inner core - dense ball of solid metal

Outline


Science of Geology

  • studying surface changes
    • surface always changing
  • finding indirect evidence
    • cannot see inside earth
    • use seismic waves
      • speed of waves tells the material

Center of the Earth

  • temperature
    • surface rock is cool
    • 20 meters/warmer
    • every 40 meters 1 degree celsius hotter
      • boy that's hot
  • pressure
    • deeper you the greater the pressure

The crust

  • continental
    • granite
      • light colored rock
  • oceanic
    • basalt

The mantle


The core


Earth's magnetic field




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